Sodium dichromate is the chemical compound with the formula Na2Cr2O7. Virtually all chromium ore is processed via conversion to sodium dichromate. In this way, many millions of kilograms of sodium dichromate are produced annually. In terms of reactivity and appearance, sodium dichromate and potassium dichromate are very similar. The sodium salt is, however, around twenty times more soluble in water than the potassium salt and its eqivalent weight is also lower, which is often desirable.
SODIUM DI CHROMATE
1. Physical state
The Material is in the form of Crystals free from foreign matter & Visible impurities.
2.Free moisture and combined water
3.Purity as Na2Cr207
(On dry basis)
Free moisture with combined water
Purity as Na2Cr2O7
pH of 10% Solution
3.7 – 4.5